Definition of carbon copy:
produced in an alternated stack of ordinary sheets of paper and carbon paper
s. The pression
applied on the top sheet (by a pen or typewriter) causes every carbon paper to release its carbon cover, thus reproducing the writing on the subjacent
layers of paper; any duplicate
"please make a carbon copy of this contract for our records."
to create a carbon copy of
"please carbon copy this contract for our records."